JFreeChart学习笔记

饼图:

 1 package com.xjz;
 2 
 3 import java.awt.Font;
 4 
 5 import org.jfree.chart.ChartFactory;
 6 import org.jfree.chart.ChartFrame;
 7 import org.jfree.chart.JFreeChart;
 8 import org.jfree.chart.axis.CategoryAxis3D;
 9 import org.jfree.chart.axis.NumberAxis3D;
10 import org.jfree.chart.axis.NumberTickUnit;
11 import org.jfree.chart.labels.CategoryItemLabelGenerator;
12 import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
13 import org.jfree.chart.plot.CategoryPlot;
14 import org.jfree.chart.plot.PlotOrientation;
15 import org.jfree.chart.renderer.category.BarRenderer3D;
16 import org.jfree.data.category.CategoryDataset;
17 import org.jfree.data.category.DefaultCategoryDataset;
18 
19 public class PieDemo {
20 
21     public static void main(String[] args) {
22         CategoryDataset dataset = getDataSet();
23         JFreeChart chart = ChartFactory.createBarChart3D("客户分类统计", 
24                 "客户等级", //X轴 
25                 "数量", //Y轴
26                 dataset ,//图表需要的数据
27                 PlotOrientation.VERTICAL,    //图表的方向
28                 true,    //是否显示图例
29                 true,    //是否显示工具提示
30                 true    //是否生成URL链接地址
31                 );
32         
33         //处理乱码
34         //1.主标题
35         chart.getTitle().setFont(new Font("宋体",Font.BOLD,18));
36         //2.子标题
37         chart.getLegend().setItemFont(new Font("宋体",Font.BOLD,18));
38         //获取图表区对象
39         CategoryPlot categoryPlot = (CategoryPlot) chart.getPlot();
40         //3.X轴
41         CategoryAxis3D categoryAxis3D = (CategoryAxis3D) categoryPlot.getDomainAxis();
42         //4.Y轴
43         NumberAxis3D numberAxis3D = (NumberAxis3D) categoryPlot.getRangeAxis();
44         //处理X轴乱码
45         categoryAxis3D.setTickLabelFont(new Font("宋体",Font.BOLD,15));
46         categoryAxis3D.setLabelFont(new Font("宋体",Font.BOLD,15));
47         //处理Y轴乱码
48         numberAxis3D.setTickLabelFont(new Font("宋体",Font.BOLD,15));
49         numberAxis3D.setLabelFont(new Font("宋体",Font.BOLD,15));
50         
51         //处理Y轴的刻度
52         //设置自动刻度为false
53         numberAxis3D.setAutoTickUnitSelection(false);
54         numberAxis3D.setTickUnit(new NumberTickUnit(1));
55         
56         //处理图形的宽度
57         //1.获取绘图区对象
58         BarRenderer3D barRenderer3D =(BarRenderer3D) categoryPlot.getRenderer();
59         barRenderer3D.setMaximumBarWidth(0.08);
60         
61         CategoryItemLabelGenerator generator = new StandardCategoryItemLabelGenerator();
62         // 处理柱体上的数字
63         barRenderer3D.setBaseItemLabelGenerator(generator);
64         barRenderer3D.setBaseItemLabelsVisible(true);
65         
66         //设置柱体上的数字的字体
67         barRenderer3D.setBaseItemLabelFont(new Font("宋体",Font.BOLD,15));
68         
69         ChartFrame frame = new ChartFrame("chart", chart);
70         frame.setVisible(true);
71         frame.pack();
72     }
73 
74     private static CategoryDataset getDataSet() {
75         DefaultCategoryDataset dataSet = new DefaultCategoryDataset();
76         dataSet.addValue(3, "客户等级", "机分客户");
77         dataSet.addValue(2, "客户等级", "签约客户");
78         dataSet.addValue(1, "客户等级", "重要客户");
79         
80         return dataSet;
81     }
82 
83 }
View Code

 柱状图:

 1 package com.xjz;
 2 
 3 import java.awt.Font;
 4 
 5 import org.jfree.chart.ChartFactory;
 6 import org.jfree.chart.ChartFrame;
 7 import org.jfree.chart.JFreeChart;
 8 import org.jfree.chart.axis.CategoryAxis3D;
 9 import org.jfree.chart.axis.NumberAxis3D;
10 import org.jfree.chart.axis.NumberTickUnit;
11 import org.jfree.chart.labels.CategoryItemLabelGenerator;
12 import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
13 import org.jfree.chart.plot.CategoryPlot;
14 import org.jfree.chart.plot.PlotOrientation;
15 import org.jfree.chart.renderer.category.BarRenderer3D;
16 import org.jfree.data.category.CategoryDataset;
17 import org.jfree.data.category.DefaultCategoryDataset;
18 
19 public class BarDemo {
20 
21     public static void main(String[] args) {
22         CategoryDataset dataset = getDataSet();
23         JFreeChart chart = ChartFactory.createBarChart3D("客户分类统计", 
24                 "客户等级", //X轴 
25                 "数量", //Y轴
26                 dataset ,//图表需要的数据
27                 PlotOrientation.VERTICAL,    //图表的方向
28                 true,    //是否显示图例
29                 true,    //是否显示工具提示
30                 true    //是否生成URL链接地址
31                 );
32         
33         //处理乱码
34         //1.主标题
35         chart.getTitle().setFont(new Font("宋体",Font.BOLD,18));
36         //2.子标题
37         chart.getLegend().setItemFont(new Font("宋体",Font.BOLD,18));
38         //获取图表区对象
39         CategoryPlot categoryPlot = (CategoryPlot) chart.getPlot();
40         //3.X轴
41         CategoryAxis3D categoryAxis3D = (CategoryAxis3D) categoryPlot.getDomainAxis();
42         //4.Y轴
43         NumberAxis3D numberAxis3D = (NumberAxis3D) categoryPlot.getRangeAxis();
44         //处理X轴乱码
45         categoryAxis3D.setTickLabelFont(new Font("宋体",Font.BOLD,15));
46         categoryAxis3D.setLabelFont(new Font("宋体",Font.BOLD,15));
47         //处理Y轴乱码
48         numberAxis3D.setTickLabelFont(new Font("宋体",Font.BOLD,15));
49         numberAxis3D.setLabelFont(new Font("宋体",Font.BOLD,15));
50         
51         //处理Y轴的刻度
52         //设置自动刻度为false
53         numberAxis3D.setAutoTickUnitSelection(false);
54         numberAxis3D.setTickUnit(new NumberTickUnit(1));
55         
56         //处理图形的宽度
57         //1.获取绘图区对象
58         BarRenderer3D barRenderer3D =(BarRenderer3D) categoryPlot.getRenderer();
59         barRenderer3D.setMaximumBarWidth(0.08);
60         
61         CategoryItemLabelGenerator generator = new StandardCategoryItemLabelGenerator();
62         // 处理柱体上的数字
63         barRenderer3D.setBaseItemLabelGenerator(generator);
64         barRenderer3D.setBaseItemLabelsVisible(true);
65         
66         //设置柱体上的数字的字体
67         barRenderer3D.setBaseItemLabelFont(new Font("宋体",Font.BOLD,15));
68         
69         ChartFrame frame = new ChartFrame("chart", chart);
70         frame.setVisible(true);
71         frame.pack();
72     }
73 
74     private static CategoryDataset getDataSet() {
75         DefaultCategoryDataset dataSet = new DefaultCategoryDataset();
76         dataSet.addValue(3, "客户等级", "机分客户");
77         dataSet.addValue(2, "客户等级", "签约客户");
78         dataSet.addValue(1, "客户等级", "重要客户");
79         
80         return dataSet;
81     }
82 
83 }
View Code

 折线图:

 1 package com.xjz;
 2 
 3 import java.awt.Font;
 4 import java.io.File;
 5 import java.io.IOException;
 6 
 7 import org.jfree.chart.ChartFactory;
 8 import org.jfree.chart.ChartFrame;
 9 import org.jfree.chart.ChartUtilities;
10 import org.jfree.chart.JFreeChart;
11 import org.jfree.chart.labels.PieSectionLabelGenerator;
12 import org.jfree.chart.labels.StandardPieSectionLabelGenerator;
13 import org.jfree.chart.plot.PiePlot3D;
14 import org.jfree.data.general.DefaultPieDataset;
15 import org.jfree.data.general.PieDataset;
16 
17 public class LineDemo {
18 
19     public static void main(String[] args) throws IOException {
20         PieDataset dataset = getDataSet();
21         JFreeChart chart = ChartFactory.createPieChart3D("客户分类统计", 
22                 dataset ,//图表需要的数据
23                 true,    //是否显示图例
24                 true,    //是否显示工具提示
25                 true    //是否生成URL链接地址
26                 );
27         Font font = new Font("宋体",Font.BOLD,18);
28         chart.getTitle().setFont(font);//主标题
29         chart.getLegend().setItemFont(font);//子标题
30         
31         PiePlot3D piePlot3D = (PiePlot3D) chart.getPlot();//图表区对象
32         piePlot3D.setLabelFont(font);//处理饼图标题乱码
33         
34         //处理饼图显示的信息
35         String labelFormat = "{0}:{1}({2})";//0--key,1--value,2--百分比
36         PieSectionLabelGenerator generator = new StandardPieSectionLabelGenerator(labelFormat);
37         piePlot3D.setLabelGenerator(generator);
38         
39         //生成图片
40         File file = new File("D:/chart.jpeg");
41         ChartUtilities.saveChartAsJPEG(file, chart, 600, 400);
42         
43         ChartFrame frame = new ChartFrame("chart", chart);
44         frame.setVisible(true);
45         frame.pack();
46     }
47 
48     private static DefaultPieDataset getDataSet() {
49         DefaultPieDataset dataSet = new DefaultPieDataset();
50         dataSet.setValue("机分客户", 4);
51         dataSet.setValue("签约客户", 3);
52         dataSet.setValue("重要客户", 6);
53         return dataSet;
54     }
55 
56 }
View Code
【推广】 免费学中医，健康全家人
原文地址：https://www.cnblogs.com/dangzhenjiuhao/p/7093249.html